Wrist watch strap



April 12, 1949. B. c. ROEHRL WRIST WATCH STRAP Filed May 13, 1946INVENTOR. BY 844mm C W WW Patented Apr. 12, 1949 UNITED WRIST WATCHSTRAP Bruno C. Roehrl, Erie, Pa., assignor to National Organ SupplyCompany, Erie, Pa., a corporation of Pennsylvania Application May 13,1946, Serial No. 669,375

4 Claims. 1

This invention is intended to provide a wrist watch strap of moldedplastic held in adjusted position by snap fasteners on the overlappingends of the strap. One feature is a loop on each of the overlapping endswhich prevents complete separation in case the fasteners areaccidentally unsnapped. Further objects and ad vantages appear in thespecification and claims.

In the accompanying drawing, Fig. 1 is a side elevation of a Watch andwrist watch strap, Fig. 2 is an enlarged view of the overlapping ends ofthe strap, and Fig. 3 is a section on line 3-3 of Fig. 2.

Referring to the drawing, l indicates a wrist watch having at oppositeends spaced ears 2 receiving hinge pins 3 forming the pivotal connectionbetween the wrist watch and the strap. The strap comprises parts 4 and 5made of flexible but substantially non-stretchable plastic, such asvinylite, nylon, etc. The part 4 has at its end a loop 6 through whichthe part 5 extends. A similar loop I is provided on the part 5. Asindicated in Fig. 2, the overlapping ends of the strap limit the maximumopening. On the outer part of the loop 6 are flaps 8 having on the underside integral projections 9 with enlarged heads I0. On the outer part ofthe loop I is a similar flap ll having on its under side a similarprojection [2.

The strap is adjusted to the desired length by sliding the overlappingends of the strap through the loops. In the adjusted position, each ofthe projections 9 and i2 registers with one of a series of openings 13in the overlapping ends of the strap. The openings are slightly smallerthan the enlarged heads of the projections so that as the projectionsare forced through the openings, the heads snap through the openings andfasten the strap. Because of the flexibility of the material from whichthe strap is made, the projections may be molded integral with the strapWhen the strap is to be unfastened, the outer ends of the flaps 8 and IIare lifted, withdrawing the projections from the openings. By locatingthe projections on a flap the unfastening of the strap is easier sincethe flaps are not held tightly against the outer surface of the strap.If the strap is accidentally unfastened, the loops 6 and I preventcomplete separation of the strap ends so there is little danger oflosing the watch.

What I claim as new is:

1. A Wrist watch strap having overlapping ends of flexible plastic, eachhaving a loop through which the other extends, a series of openings inthe ends, and integral inwardly extending projections on the outer partof each loop registering with different openings as the strap isadjusted, the projections having heads of greater size than the openingswhereby as the projections are forced into the openings the heads snapthrough and hold-the strap in adjusted position.

2. A wrist watch strap having overlapping ends of flexible plastic, eachhaving a loop through which the other extends, each loop having a flapon the outside of the strap, a series of openings in the ends, andintegral inwardly extending projections on the inner surfaces of theflaps registering with different openings as the strap is adjusted, theprojections having heads of greater size than the openings whereby asthe projections are forced into the openings the heads snap through andhold the strap in adjusted position.

3. A wrist watch strap having overlapping ends of flexible plastic, onehaving a loop through which the other extends, an integral inwardlyextending projection on the outer part of the loop having an enlargedhead, and registering openings of smaller size than the head in the endunderlying the outer part of the loop into which the projection may besnapped to hold the strap in adjusted position.

4. A wrist watch strap having overlapping ends of flexible plastic, onehaving a loop through which the other extends, a flap on the outer partof the loop, an integral inwardly extending projection on the flaphaving an enlarged head, registering openings of smaller size than thehead in the end underlying the flap into which the projection may besnapped to hold the strap in adjusted position.

BRUNO C. ROEHRL.

REFERENCE S CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 466,647 Yerington Jan. 5, 18521,831,452 Johnson Nov. 10, 1931 1,851,733 Shapiro Mar. 29, 1932-2,392,761 Pease Jan. 8, 1946

